JPS5917134Y2 - Seal structure of operating shaft for planting claws in rice transplanter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealing structure for an operating shaft for planting claws in a rice transplanter.

In other words, in a rice transplanter configured with both claws arranged opposite each other so that a seedling block cut and held by fixed claws is forcibly planted on the rice field by the push of a movable claw, a boot is attached to an operating shaft for supporting the movable claw. These boots have a waterproof effect, increase the sealing effect by increasing the surface pressure locally, and since the surface pressure is not high over the entire area, they can slide on the operating shaft and have good durability. It is provided so that it can be installed.

The embodiments shown in the drawings will be described below.

Figure 1 is a partially cutaway side view of the entire rice transplanter, with the transmission case extending in the front and back direction above the float 10]1
An engine E is connected to the front part of the machine, wheels 12 on both sides in the middle of the machine body in the longitudinal direction are respectively mounted on a swing case 13, and a handle 14 is extended from the rear part of the transmission case 11, which is the rear part of the machine body, to the rear upper part. In front of the handle 14, a seedling stand 5 on which mat seedlings are placed is provided obliquely.

In addition, the tip of the driven arm 16 that can reciprocate around the fulcrum O at the lower side of the transmission case 11 is attached to the planting arm 3.
A crank arm 1 is attached to a drive shaft 18 that is rotatably connected to one end via a pivot shaft 17 and protrudes to the side of the transmission case 11.
9 is fixed, and the tip of the crank arm 19 and the planting arm 3
A pivot shaft 20 is rotatably inserted into the middle part of the planting arm 3, and the half side of the planting arm 3 is formed into a case part 3a.

An operating shaft 4 extending inward and outward is slidably inserted into a supporting portion 21 protruding from the tip of the case portion 3a via a seal 22, etc., and a push lever 23 is pivotally supported within the case portion a. One end 23a of the push lever 23 is brought into contact with the cam 24 on the pivot shaft 20, and the other end 23 of the push lever 23 is pressed by the elastic force 25.
3b is engaged with a hook piece 26 fixed to the inner end of the operating shaft 4, the movable claw 2 is fixed to the outer tip of the operating shaft 4, and the base is attached to the upper part of the support part 21. It is constructed by extending long on the side of the fixed claw 2 which is verified with the bolt 27.

In addition, the movable claw 2 moves back and forth along the tip of the fixed claw 1 as the actuating shaft 4 moves back and forth from the case portion 3a, and the planting claws are arranged oppositely to each other. Constructed,
As the crank arm 19 rotates, both claws 1 and 2 appear in the seedling take-out port 15a at the bottom of the seedling platform 15, and the planting trajectory is started with the movable claw 2 holding down the seedling block cut and held by the fixed claw 1. It is constructed so that it can be moved as shown in FIG.

An operating shaft 4 protruding from the support portion 21 in the case portion 3a
A bellows-shaped boot 5 made of synthetic leather and rubber and having a truncated conical shape is attached to the upper half part, and the base side fitting part 5a at one end side of the boot 5 is connected to the collar part at the tip of the support part 21. 21
a, and the inner diameter of the distal fitting portion 5b of the boot 5 is made smaller than the diameter of the actuating shaft 4, so that the inner diameter D1 of the inner end 6a of the hole 6 in the distal fitting portion 5b is the outer end. The hole 6 is formed in advance in the shape of a truncated cone, which is larger than the inner diameter D2 of the portion 6b and slightly narrower than the outer diameter of the operating shaft 4, and is inserted into the operating shaft 4.

During rice planting work, the planting claws of the fixed claw 1 and the movable claw 2 circulate through the planting path A as shown in Fig. 2 due to the rotation of the planting arm 3. The seedling blocks can be inserted and planted under the rice field 28 by pushing the movable claws 2.

In this state, the boots 5 approaching the paddy field can perform a sealing function to ensure waterproofness on the side of the case portion 3a.
In addition, due to the fitting between the fitting part 5b and the actuating shaft 4, the surface pressure increases locally, improving the sealing effect, and since the surface pressure is not high over the entire fitting surface, the fitting part 5b is pressed against the actuating shaft 4. It can also slide against the surface.

As described above, the present invention provides a rice transplanter in which both claws 1 and 2 are arranged opposite each other so that the seedling blocks cut and held by the fixed claws 1 are forcefully planted on a circular surface by the push of the movable claws 2. An operating shaft 4 for supporting the movable claw 2 is provided so as to be freely retractable from the case portion 3a of the planting arm 3 that operates the claws 1 and 2 along the planting trajectory, and an operating shaft 4 located outside the case portion 3a is provided. The base side fitting part 5a of the waterproof boot 5 that is attached to the upper half part is fitted to the case part 3a side, and the inner diameter of the tip side fitting part 5b of the boot 5 is made smaller than the diameter of the operating shaft. Since the inner diameter D1 is formed to be larger than the outer inner diameter D2 and the boot 5 is fitted and attached to the operating shaft 4, the waterproof effect can be improved by attaching the boot 5 to the operating shaft 4 of the movable claw 2, and in particular, In fitting the fitting part 5b and the operating shaft 4, the inner diameter D2 of the outer end 6b of the fitting part 5b is the inner diameter D of the inner end 6a.
Since it is made smaller than 1, it is possible to locally increase the surface pressure and improve the sealing effect, and since the entire inner diameter of the tip fitting portion 5b of the boot is configured to be smaller than the operating shaft 4, the entire fitting is possible. Since a wide contact surface can be obtained and the surface pressure is not high, it is possible to slide on the actuating shaft 4, and the durability of the boot 5 can be improved as well as the sealing effect. , there is no need to provide a groove on the operating shaft for fitting with the tip of the boot, and it is possible to effectively remove dirt, etc. from the lower half of the operating shaft between the boot tip and the movable pawl. Since the boot is attached only to the upper half of the actuating shaft 4 outward from the part 3a, there is no tangle of mud or the like between the movable claw and the tip of the boot, which has an excellent feature that allows comfortable work.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway side view of the rice transplanter, Fig. 2 is a sectional view of the main part, Fig. 3 is an enlarged sectional view of a part of the main part, and Fig. 3 is a partially cutaway side view of the rice transplanter. FIG. 4 is a sectional view of a part of the main part before inserting the operating shaft. 1...Fixed claw, 2...Movable claw, 3...
...Planting arm, 3a...Case part, 4.
...Operating axis, 5...Boots, 5a, 5b
...Mating part, DI, D2...Inner diameter.

Claims (1)

[Scope of utility model registration request] In a rice transplanter configured with both claws 1 and 2 arranged opposite each other so that a seedling block cut and held by a fixed claw 1 is forcibly planted on the rice field by the push of a movable claw 2, both claws 1 and 2 are used as a planting trajectory. An operating shaft 4 for supporting the movable claw 2 is provided to be movable in and out of the case portion 3a of the planting arm 3 to be operated along the same direction, and is attached to the upper half of the operating shaft 4 on the outside of the case portion 3a. The base side fitting part 5a of the waterproof boot 5 is attached to the case part 3a side, and the inner diameter of the tip side fitting part 5b of the boot 5 is made smaller than the diameter of the operating shaft, and the inner inner diameter D1 is larger than the outer inner diameter D2. A sealing structure for an operating shaft for planting nails, characterized in that the seal structure is formed so that the operating shaft is fitted into the operating shaft 4 and is attached to the operating shaft.